Viscous spreading of an inertial wave beam in a rotating fluid
| Autor: | Frédéric Moisy, Cyril Lamriben, Pierre-Philippe Cortet |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Fluid Flow and Transfer Processes
Physics Mechanical Engineering Wave packet Computational Mechanics Fluid Dynamics (physics.flu-dyn) FOS: Physical sciences Vertical plane Physics - Fluid Dynamics Mechanics Internal wave Velocimetry Vorticity Condensed Matter Physics Similarity solution Inertial wave Physics::Fluid Dynamics Mechanics of Materials Beam (structure) |
| DOI: | 10.48550/arxiv.1003.3631 |
| Popis: | We report experimental measurements of inertial waves generated by an oscillating cylinder in a rotating fluid. The two-dimensional wave takes place in a stationary cross-shaped wavepacket. Velocity and vorticity fields in a vertical plane normal to the wavemaker are measured by a corotating Particule Image Velocimetry system. The viscous spreading of the wave beam and the associated decay of the velocity and vorticity envelopes are characterized. They are found in good agreement with the similarity solution of a linear viscous theory, derived under a quasi-parallel assumption similar to the classical analysis of Thomas and Stevenson [J. Fluid Mech. 54 (3), 495-506 (1972)] for internal waves. |
| Databáze: | OpenAIRE |
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